PHYSICAL AND CLIMATIC FACTORS 421 



impossible for land forms. For this reason, it is likely that 

 the largest of the Dinosaurs were more or less aquatic. 



Literature 



Brooks, C. E. P. Climate through the Ages. Benn, London, 1926. 



d'Arcy Thompson. Growth and Form. Cambridge University Press, 

 1917. 



Haldane, J. B. S. Possible Worlds. Chatto and Windus, London, 1927. 



Hesse, R. Tiergeographie auf okologischer Grundlage. Fischer, Jena, 

 1924. 



Przibram, H. Form und Formel im Tierreiche. Deuticke, Leipzig and 

 Wien, 1922. 



